Method of making axle-nuts



Patented Jan. 29, 1889.

E. HRTH 85 A. su '1. TOMPK'INS.

METHOD OP MAKING AXLB NUTS.

(No ModeL) @mi/Macway I UNITED STATES PATENT OEETEE.

EDIVIN FIRTI-I, ALBERT TOMPKINS, AND IRA TOMPKINS, OF TROY, NEIV YORK.

METHOD OF MAKING AXLENUTS.

SPECIFICATION forming part of Letters Patent No. 396,865, dated January 29, 1889. Application filed February 23, 1888. Serial No. 264,884. (No model.)

To @ZZ 107mm it may concern.: threads in the nut will not become worn by Be it known that we, EDWIN FTRTH, ALBERT serewingand unscrewing the same on the axle. TOMPKINs, and IRA TOMPKINs, citizens of the Our said method of making such an axle- United States, residing at Troy, in the county nut is as follows: A pair of blocks, A B, have 5 of Rensselaer and State of New York, have dies forn'ied in them adapted to form a nut of 55 invented a new and useful Improvement in the requisite size and shape. The lower die Methods of Making' Axle-Nuts, of which the is placed on the bed of a drop-hammerrlhe following` is a specification. upper die is secured to the han1merhead in Our invention relates to animprovementin the usual manner and arranged to register Io methods of making' axle-nuts; and it consists with the lower die. Into the latter is placed 6o in forging' the nut from steel or iron, then a piece of steel or iron of such size as will sufcounterboring the nut to form the oil-chamlice to complete the nut and leave a surplus. ber, then capping the outer end of the nut to rl`his piece of steel or iron is lirst heated until complete the oil-chamber, and linally cutting it becomes plastic, and when it is placed in I5 screw-threads on the inner side oli' the nut, the lower die the hammer is operated and 65 whereby an axle-nut will he produced which caused to descend, so that the upper die shall is as hard the steel of which vehicle-axles drop onto the lower die and thereby forge the are composed, has perfect screw-threads on nut, as shown in Fig. 2, any requisite numits inner surface, and is very much more duber of strokes being' given to the hammer to zo. rable than the axle-nuts heretofore manufacaccomplish this result. The surplus steel or 7o tured, will be more fully set forth hereiniron forms a 'fm, X, between the faces of after, and particularly pointed out in the the die, and is afterward cut off from the nut claims. by a suitable machine. The two dies do not` In the drawings,Figurel is a perspective quite meet at the center, and hence form a 25 view, partly in section, of a pair of dies web, Y, across the bore of the nut, which web 75 adapted to forge an axle-nut by our improved is subsequently punched out. method. Fig. 2 is a sectional view of the The act of forging the steel forces the dross same, showing the dies closed together in the and other impurities vtherefrom and comact of forging the nut. Fig. Sis a perspective presses the molecular particles thereof, and

3o view of our improved form of axle-nut after thereby toughens the nut, as will be readily 8o the same has been forged by the dies. Fig. understood. After removing the nut from 4 is a longitudinal. sectional view of the same the dies the same is finished and has screwafter it has been counterbored to form the oilthreads eut in its bore or inner surface and chamber and threaded internally. is fitted for the market.

E 35 Axlenuts have heretofore been made of Then it is desired to form an oil-chamber 85 cast-iron, brass, and other castmaterials which in the nut, the form shown in Fig. 3 is counare not as hard or durable as the spindles of terbored in the usual manner by placing it on steel axles, and are consequently objectionaa lathe. ble for the reason that the threads cut from In Fig. 4 we show the completed nut. After 4o the said nuts to lit the threads on the axles counterboring the nut so as to remove the pin 9o become worn after awhile and permit the Y, the outer end of the nut is closed byacap, nuts to work loose and drop from the axles G, which is held in place by spinning down and allow the wheels to come off. A further the rim of the nut. objection to nuts made of malleable cast-'iron Any-desired shape or con figuration may be 45 is that the screw-threads formed therein canimparted to the nut, and the same may be 95 not be made entire. made of any required size.

The object of our invention Ais to provide a No claim is made in this application to the method by means of which axle-nuts may be nut or to the blocks or dies for forming the forged from steel or iron as hard as the matesame, as the same constitute the basis for an i 5o rial of which axles are composed, so that the application for Letters Patent of the United Ioo States, Serial No. 255,129, led by us November 14, 1887.

Having thus described onil invention, we elaiml. The method ot' making an axle-nut, Consisting in forging the same from steel o1' iron, then eounterboring the nut to form the oil.-

ehztmber, and finally cutting screw-threads on i the inner side of the nut, as set forth.

2. The method of making' an axle-nut, e011- sisting in foi'gil'lg the same from steel oi'iron, then eounteiboring the nut to form the ol chamber, and then Capping the outeil end of the nut to complete the oil-Chamber,l as set forth.

In testimony that We Claim the foregoing as 15 oui' own We have hereto affixed our Signatures in presence of two witnesses.

EDXVIN FIRTH. ALBERT TOMPKINS. IRA TOMPKINS.

\Vit11esses:

WILLIAM ISENBERGH, HARRY J'. TOMPKINS. 

